Other

Po Stavropolpolimer

Institut Khimicheskoi Fiziki an Sssr

Groznensky Filial Oppo

Sergei S Ivanchev

Anatoly A Syrov

Valery N Pavljuchenko

Boris V Polozov

Oleg N Primachenko

Fridrikh S Dyachkovsky

Nikolai S Enikolopov

Viktor I Zhukov

Galina S Sergienko

Zinaida M Pessina

Elena D Vasilieva

Zorislav N Polyakov

Jury M Petrov

Gennady P Belov

Ninel N Lesnikova

Larisa F Maladzyanova

Vram T Shirinian

Suren S Mnatsakanov

Olga N Reznikova

Marta P Potiforova

Mark E Rozenberg

Olga N Romantsova

Natalya V Kartasheva

Ljudmila N Trushkina

Anatoly I Germashev

Valery A Yatsenko

Zinaida M Dzhabieva

Valery I Lazutin

Valentina A Demidova

Ekaterina I Egorova

Evgeny N Barantsevich

Valery V Gromov

Valentina G Karmakova

Malik S Gabutdinov

Vladimir I Fionov

Saida R Ivolgina

Vladimir L Proskurnin

Galina Ballova

Diana A Rozhkova

Method of preparing 1-butene and/or hexenes

Process for producing butene-1

Process of preparing copolymers of butyl acrylate and 1-(.alpha.-alkyl

Method for producing latices of copolymers of butyl acrylate and

Novel chemical compounds, copolymers of vinyl acetate, ethylene and peroxy alkyl acrylate having the following general formula: ##STR1## wherein R.sub.1 represents a normal alkyl, --CH.sub.3, --C.sub.2 H.sub.5, --C.sub.3 H.sub.7, --C.sub.4 H.sub.9, or --C.sub.5 H.sub.11 ;

Copolymers of vinyl acetate, ethylene and peroxy alkyl acrylate

Novel compounds according to the present invention, i.e. derivatives of .alpha.,.omega.-bis-alkyl esters of isobutyric acid having the formula: ##STR1## A method for preparing the above-specified novel compounds consists in reacting .alpha.,.alpha.'-azo-bis-isobutyric acid dinitrile and a saturated alkyl monohydric alcohol derivative of the formula ROH, wherein R: ##STR2## with gaseous hydrogen chloride in an organic solvent medium in the presence of 0.5-5% by mass of a water-soluble ether at a temperature within the range of from -5.degree. to +6.degree. C., followed by treating the resulting reaction mixture with water at a temperature of from 0.degree. to -5.degree. C. and isolation of the desired product. The novel compounds according to the present invention are useful as initiators for a radical-type polymerization of ethylenically unsaturated compounds, as well as the starting products for the manufacture of reactive polymers by a simplified process.

.alpha.,.alpha.-azo-bis-isobutyric acid .alpha.,.omega.-bis alkyl ester

Disclosed are novel hydroperoxide derivatives of hydroxyethylated compounds of the general formula: ##STR1## a-whole number 10 to 30, b, c are absent, R=n-alkyl from C.sub.8 to C.sub.20, secondary alkyl of C.sub.14, C.sub.15 and ##STR2## where R.sub.2 =n-alkyl from C.sub.8 to C.sub.12 ##STR3## where R.sub.3 and R.sub.4 =R.sub.8 --C.dbd.O, where R.sub.8 =--CH.sub.3 or H, if R.sub.6,7,9 =H R.sub.5 is absent or ##STR4## where R.sub.9 =--CH.sub.3 or H, if R.sub.6,7,8 =H, R.sub.5 is absent; R.sub.10 =n-alkyl of C.sub.1 to C.sub.9 of R.sub.3 .noteq.R.sub.4 R.sub.5 =--CH.sub.2 if R.sub.6,7,8,9 =H; if R.sub.5 is absent, R.sub.1 is acyclic and is ##STR5## R.sub.6 =--CH.sub.3 or H, if R.sub.7,8,9 =H, R.sub.5 is absent, R.sub.7 =--CH.sub.3 or H, if R.sub.6,8,9 =H, R.sub.5 is absent, with x=--O--, b-whole number of 8 to 24, (a+c)-whole number of 6 to 30

Hydroperoxide derivatives of hydroxyethylated compounds and method of

The process for producing mineral fillers with graft peroxy groups for polymers according to the present invention comprises treatment of mineral fillers, at a temperature of from 50 to 150.degree. C. under a pressure of from 1.33.10.sup.2 to 4.10.sup.5 Pa (lmmHg to 4 atm), with an organosilicon compound of the formula:

Process for producing mineral fillers with graft peroxy groups for

According to the invention, the method for producing mineral polymer fillers containing graft hydroperoxide groups consists in treating mineral fillers at a temperature of 50.degree. to 150.degree. C. and a pressure of 1.33.10.sup.2 to 4.10.sup.5 Pa (1 mm Hg to 4 atm) with organosilicon compounds of the general formula:

Method for producing mineral fillers containing graft hydroperoxide

The process for producing shock-proof graft copolymers of styrene with synthetic rubber consists in that rubber is dissolved in styrene at a maximum temperature of 75.degree. C. The resultant solution is subjected to prepolymerization by being heated to 75-85.degree. C. in the presence of a plasticizer and a peroxide initiating agent. The peroxide initiator is essentially a composition of the following formulation (in parts by weight): diacylated peroxides of aliphatic acids C.sub.3 -C.sub.5, 2 to 8; diacylated peroxides of aliphatic acids C.sub.6 -C.sub.9, 80 to 89; diacylated peroxides of aliphatic acids C.sub.10 -C.sub.12, 7 to 14. The prepolymerization process proceeds until the 25-40 percent styrene conversion. The result is the prepolymer which is exposed to aqueous-suspension polymerization by being heated in an aqueous medium to maximum 140.degree. C. at a prepolymer-to-water volume ratio ranging within 5:3 and 10:3, respectively, in the presence of peroxide polymerization; initiators and a stabilizing system, consisting of 0.15-1.5 wt. % tricalcium phosphate, 0.003-0.02 wt. % of a mixture of disubstituted sodium alkylsulphates of a general formula as such: R--OSO.sub.3 Na, where R is a hydrocarbon radical, containing 8 to 18 carbon atoms, and 0.15-0.35 wt. % calcium carbonate. The process is distinguished for a simple flowsheet; it involves no molecular-weight modifier. Copolymers produced according to the proposed process feature high physico-mechanical characteristics.

Process for producing shock-proof graft copolymers of styrene with

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Saint-Petersburg, Russia

Sergei S Ivanchev